How long can losartan tablets be used after the expiration date?
Losartan tablets are typically considered safe and effective only through the labeled expiration date. After that date, the manufacturer no longer guarantees potency (how strong the medicine is) or consistent performance.
Because you asked “how long,” the key practical point is this: there is no single, reliable number of months or years that applies to everyone. Stability can vary by formulation, storage conditions (temperature, humidity, light), and the specific product.
What affects whether losartan is still okay after expiration?
How long losartan may retain potency after its expiration depends mostly on:
- Storage conditions (for example, keeping tablets in a cool, dry place instead of a hot, humid bathroom area).
- Whether the bottle has been opened and repeatedly exposed to air and humidity.
- Whether tablets look or smell unusual (crumbling, discoloration, or other changes are a reason not to use them).
Is it ever recommended to keep using expired losartan?
If you are out of supply or can’t get a refill immediately, the safest approach is to contact your pharmacist for guidance on that specific product. In most cases, pharmacists will suggest getting a replacement rather than extending use beyond the expiration date, especially for medicines used to control blood pressure long-term.
When should you not take expired losartan?
Do not use expired losartan if:
- The tablets look different than when you opened the bottle (color change, cracks, powdering, or moisture damage).
- The bottle has been exposed to excessive heat or humidity.
- You’re unsure whether it was stored properly.
If any of those apply, replace it.
Practical next step
Check the label for the exact lot/strength and expiration date, then ask your pharmacist whether that specific losartan product (and how it was stored) has a known stability history they can reference. If you want, tell me the form (tablets vs. another form), the manufacturer (if shown), and where it’s been stored, and I can help you decide what to ask your pharmacist.